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Apparatus for detection of the accuracy of format of a web of corrugated cardboard

a technology of corrugated cardboard and accuracy, which is applied in the direction of measuring devices, material analysis through optical means, instruments, etc., can solve the problems of large construction effort for crosswise displacement of sensors, and the time required for the respective measuring process in relation to the high speed of corrugated cardboard webs in corrugated-cardboard machines

Inactive Publication Date: 2011-05-31
BHS CORRUGATED MASCHEN & ANLAGENBAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]By the measures wherein on both sides of the web of corrugated cardboard is arranged in each case one reference point with a constant distance f from each other whose distance g from each other is continuously detected by the measuring camera, it is attained that temperature-related measuring errors in the camera can be compensated. Thus, the camera constantly receives an exact reference value for the distance between the two reference points which allows for numerical compensation of measuring errors.

Problems solved by technology

A disadvantage is that the constructional effort for crosswise displacement of the sensors is quite extensive and that the time required for the respective measuring process in relation to the high speed of webs of corrugated cardboard in corrugated-cardboard machines is very high.

Method used

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  • Apparatus for detection of the accuracy of format of a web of corrugated cardboard
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  • Apparatus for detection of the accuracy of format of a web of corrugated cardboard

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Embodiment Construction

[0016]FIGS. 1 and 2 show a schematic view of a web of corrugated cardboard 1 which may however also be a conventional web of cardboard. The web of corrugated cardboard 1 conventionally comprises at least an upper smooth liner 1a and a lower, likewise smooth liner 1b between which is disposed a corrugated paper web 1c which is glued to the liners 1a and 1b. In the course of its production, the web of corrugated cardboard 1 is located on an apparatus for producing corrugated cardboard, strictly speaking downstream of a grooving and longitudinal cutting arrangement (not shown) when seen in the conveying direction 2, as it is for example shown and described in EP 0 692 369 B1 (corresponding to U.S. Pat. No. 5,857,395) which is explicitly referred to. In this arrangement, the web of corrugated cardboard 1 has been provided with upper grooves 3, 4 running in the conveying direction 2 and lower counter grooves 5 allocated thereto. In this arrangement, the web of corrugated cardboard 1 has ...

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Abstract

An apparatus for detection of the accuracy of format of a web of corrugated cardboard moved in a conveying direction comprises a light source which emits a light band to the surface of the web of corrugated cardboard in a direction crosswise of the conveying direction and at an angle to the web of corrugated cardboard. A measuring camera detects the different light intensities of the light reflected by the plane portions and the profiled patterns of the web of corrugated cardboard. This electronic image in the camera is evaluated by an evaluation device for determining the distance of the profiled patterns from each other.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The invention relates to an apparatus for detection of the accuracy of format of a web of corrugated cardboard moved in a conveying direction, which corrugated cardboard comprises at least an upper liner with a surface and a total width a and at least two profiled patterns of the upper liner, namely lateral edges and at least one of a longitudinal cut dividing the web of corrugated cardboard into partial webs and at least an upper groove, which profiled patterns run in the conveying direction and which profiled patterns have distances b, c, d from each other, and which corrugated cardboard has plane portions of the surface between the profiled patterns.[0003]2. Background Art[0004]In such an apparatus known from U.S. Pat. No. 6,836,331, two sensors are arranged on both sides of the web of corrugated cardboard, of which a first sensor is designed such as to measure the distance of the first liner from the first sensor an...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G01N21/84
CPCB31F1/2831G01N21/8901G01B11/24G01N2021/8905
Inventor KRAUS, HELMUTHAUSNER, MARKUS
Owner BHS CORRUGATED MASCHEN & ANLAGENBAU
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